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babymother [125]
3 years ago
7

What is the answer x^2+28=0

Mathematics
2 answers:
marshall27 [118]3 years ago
5 0

Answer:

the answer is ( there is no real solutions) i hoped this help if you need an explanation why let me know :)

Blababa [14]3 years ago
3 0

Answer:

x = 2√7 or 5.2915

Step-by-step explanation:

x^2 + 28 = 0

first get the variable by itself by subtracting the 28 from both sides. 28-28 cancels and 0-28=-28.

now you have

x^2 = -28

take the square root of x^2 to cancel out the exponent, and then do the same to the other side,

x = √28

x = 2√7 or 5.2915

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1+1=2

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What is the proportion?????
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In a study, researchers wanted to measure the effect of alcohol in the development of the hippocampal region in adolescents. The
lbvjy [14]

Answer:

Kindly check explanation

Step-by-step explanation:

Given :

Sample size, n = 30

Tcritical value = 2.045

Null hypothesis :

H0: μ = 9.08

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Sample mean, m = 8.25

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Test statistic : (m - μ) ÷ s/sqrt(n)

Test statistic : (8.25 - 9.08) ÷ 1.67/sqrt(30)

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Test statistic : - 2.722

Tstatistic = - 2.722

Decision region :

Reject Null ; if

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Tcritical : - 2.045

-2.722 < - 2.045 ; We reject the Null

Using the α - level (confidence interval) 0.05

The Pvalue for the data from Tstatistic calculator:

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4 0
3 years ago
An airplane pilot is fertilizing a field. The height y in feet of the fertilizer t seconds after it is dropped is modeled by y(t
zheka24 [161]

Answer:

About 360.178 feet

Step-by-step explanation:

So we want the vertical distance between the fertilizer and the ground to be 0.

This going to be about the time the pilot has dropped it

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We are going to use the quadratic formula to solve for t:

a=-16

b=-3

c=300

The quadratic formula is:

t=\frac{-b \pm \sqrt{b^2-4ac}}{2a}

t=\frac{3 \pm \sqrt{(-3)^2-4(-16)(300)}}{2(-16)}

t=\frac{3 \pm \sqrt{9+19200}}{-32}

t=\frac{3 \pm \sqrt{19209}}{-32}

t=\frac{3+\sqrt{19209}}{-32} \text{ or } \frac{3-\sqrt{19209}}{-32}

t \approx -4.424891774 \text{ or } 4.237391774

So the pilot has released it at about 4.237391774 seconds since the fertilizer has actually hit the ground at roughly this time.

So we want to know the horizontal distance at t=4.237391774:

85t

85(4.237391774)

360.1783008

360.178 feet

7 0
3 years ago
Find the gradient of the line segment between the points (-6,4) and (-4,10).
maw [93]

Answer:

gradient = 3

Step-by-step explanation:

Calculate the gradient using the slope formula

m = \frac{y_{2}-y_{1}  }{x_{2}-x_{1}  }

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3 0
4 years ago
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